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Diffstat (limited to 'samplecode/SampleWritePixels.cpp')
-rw-r--r-- | samplecode/SampleWritePixels.cpp | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/samplecode/SampleWritePixels.cpp b/samplecode/SampleWritePixels.cpp new file mode 100644 index 0000000..45e9f41 --- /dev/null +++ b/samplecode/SampleWritePixels.cpp @@ -0,0 +1,70 @@ + +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "SampleCode.h" +#include "SkView.h" +#include "SkCanvas.h" +#include "SkCornerPathEffect.h" +#include "SkCullPoints.h" +#include "SkGradientShader.h" +#include "SkPath.h" +#include "SkRegion.h" +#include "SkShader.h" +#include "SkUtils.h" + +static void create_bitmap(SkBitmap* bitmap) { + const int W = 100; + const int H = 100; + bitmap->setConfig(SkBitmap::kARGB_8888_Config, W, H); + bitmap->allocPixels(); + + SkCanvas canvas(*bitmap); + canvas.drawColor(SK_ColorRED); + SkPaint paint; + paint.setColor(SK_ColorBLUE); + canvas.drawCircle(SkIntToScalar(W)/2, SkIntToScalar(H)/2, SkIntToScalar(W)/2, paint); +} + +class WritePixelsView : public SampleView { + SkPath fPath; +public: + WritePixelsView() {} + +protected: + // overrides from SkEventSink + virtual bool onQuery(SkEvent* evt) { + if (SampleCode::TitleQ(*evt)) { + SampleCode::TitleR(evt, "WritePixels"); + return true; + } + return this->INHERITED::onQuery(evt); + } + + virtual void onDrawContent(SkCanvas* canvas) { + SkBitmap bitmap; + create_bitmap(&bitmap); + int x = bitmap.width() / 2; + int y = bitmap.height() / 2; + + SkBitmap subset; + bitmap.extractSubset(&subset, SkIRect::MakeXYWH(x, y, x, y)); + + canvas->translate(SkIntToScalar(20), SkIntToScalar(20)); + + canvas->writePixels(bitmap, 0, 0); + canvas->writePixels(subset, 0, 0); + } + +private: + typedef SampleView INHERITED; +}; + +////////////////////////////////////////////////////////////////////////////// + +static SkView* MyFactory() { return new WritePixelsView; } +static SkViewRegister reg(MyFactory); + |